Exercises best for improving posture include strengthening and stretching routines targeting specific muscle groups. Activities like planks, bridges, and rows strengthen the core, back, and shoulders, promoting proper alignment. Stretching exercises, such as pec stretches and hip flexor stretches, help alleviate tightness that contributes to poor posture. Practices like yoga and Pilates are also beneficial, as they improve flexibility and body awareness, further enhancing overall postural stability and balance.